The most legible font is the font you're most familiar with. I used to take fonts very seriously, tweaking Fontconfig settings, etc. I now use default sans-serif for everything. I literally don't know what font it is, and it's just as legible as my customized setup. Despite all the jokes about Comic Sans I doubt it would take more than a week to get used to it.

Stopped breathing doesn't kill instantly. It's not practical with 100s of people, but with only one there should be time to restrain that person and inject them with naloxone.

You can do meaningful mathematics research with nothing but pencil and paper. Filtering out frivolous submissions is a worthwhile goal, but the fee should be adjusted according to the author's ability to pay.

Try using no toothpaste at all:
http://www.ijdr.in/article.asp?issn=0970-9290;year=2010;volume=21;issue=2;spage=213;epage=217;aulast=Jayakumar
I stopped using toothpaste about a year ago, to no perceptible effect. Brushing+flossing alone is sufficient to keep your teeth healthy.

Lots of tests have been done, here's a good one:
http://www.pnas.org/content/109/3/760

See also:
http://en.wikipedia.org/wiki/Stradivarius#Comparisons_in_sound_quality

You make a Stradivarius the same way you make any other high quality violin, as shown by skilled musicians failing to distinguish them from modern replicas in blind tests.

Running under DOS typically does not give you 100% control over the CPU:

http://en.wikipedia.org/wiki/System_Management_Mode

Maintaining contrast with the adverts was the only reason networks didn't remove all the dynamic range from the programming. Now that the contrast is illegal, there's nothing stopping channel vs. channel competition for loudness. Just as election campaigns target the swing voters, TV producers care about the channel flippers, and being louder than the competition is an easy way to grab their attention.

This law has the perverse consequence of making *everything* sound as bad as the adverts.

Running an operating system is both an advantage and a disadvantage. Hard realtime is much easier on an Arduino.

I also change my sitting position frequently. I removed my chair's arm rests to allow more flexibility.

I use a Microsoft Natural Ergonomic 4000, which has a great layout but poor quality rubber dome keyswitches. Several people on the geekhack.org keyboard forums have modded these to use mechanical keyswitches, so maybe I'll do the same.

A good modern low self-discharge NiHM (eg. 2nd generation Eneloop) can survive more charge cycles than lithium ion, and has better self-discharge performance. Capacity is a bit worse than traditional NiMH, but it's still a lot better than NiCd. It would probably be possible to build a NiMH that meets your specifications for electric vehicles.

Tried a low self-discharge NiMH? I strongly recommend the 2nd generation Eneloops. Excellent self-discharge performance and lots of charge cycles. Better high current performance than alkalines too. It's very rare to find something that won't run on 1.2V cells nowadays.

And don't forget that all OSs default to running 120Hz monitors at 60Hz. You have to change them to 120Hz manually. Windows even sometimes resets them back to 60Hz when you change some other display setting.

Do you use a wireless mouse? Some of them update only at about 60Hz, so you'll not see the benefit in window dragging. And even with a wired mouse, the default 100Hz (Linux) or 125Hz (Windows) mouse update rate isn't fast enough to guarantee updating every frame on a 120Hz monitor, so you'll need to change mousepoll (Linux) or install a hacked hidusbf with test certificate (Windows). It's also possible your window compositing system is capped at 60fps. IIRC correctly Compiz does that unless you change some hidden setting, and maybe Aero does too. I don't use compositing.

The difference between 60Hz and 120Hz is extremely obvious if you're actually updating every frame. I refused to use a LCD until 120Hz LCDs were available, and even that's just barely adequate. A 200Hz CRT is clearly smoother.

All FPSs have some randomness to them, because of random player spawns, and because optimal play involves moving unpredictably. When players are limited by bad hardware they reach a point where significant skill differences are no longer possible and the randomness dominates. With high quality hardware (and good game design) the player skill difference dominates.